1. EXTRACTION OF OIL FROM OIL CAKE BY SOXHLET EXTRACTOR
PREPARED BY Asma-Ul-Husna ID:1002059 Level-3,Term-1 Department Of
Chemical Engineering, BUET A TECHNICAL PRESENTATION ON
2. OBJECTIVE OF THE EXPERIMENT To study Soxhlet extractor To
determine the percentage of extracted oil from oil cake To
determine the percentage of solvent (n-Hexane) recovery used for
extraction
3. SOLVENT EXTRACTION Solvent extraction generally includes
three steps Diffusion of the solvent through the pores of solid
Diffused solvent dissolves the solute Transfer of the solution from
porous solid to the main bulk of the solution When extraction is
done by Soxhlet apparatus, it is known as Soxhlet extraction
4. APPLICATION OF SOXHLET EXTRACTION Coffee beans used to
produce biofuel Seed extract of fenugreek contains anticancer
properties Beverages Food industries use extraction for analyzing
food components Oil extraction from plants
5. EXPERIEMENTAL SETUP n-Hexane vapor Liquid n-Hexane n-Hexane
with oil The apparatus used in the experiment is known as Soxhlet
extractor
6. EXPERIEMENTAL SETUP (contd) n- Hexane vapor Cooling
water
7. PROCESS BLOCK DIAGRAM The experiment had two main parts
Solvent extraction Solvent recovery
8. n-HEXANE AS A SOLVENT Low latent heat of vaporization (335
KJ/kg) Highly volatile i.e. low boiling point (690 C) High
solubility of vegetable oils in hexane Chemically inert with oil
components Almost negligible corrosive nature Commercial
availability and low cost Proper caution should be taken while
working with n- Hexane, as it is a flammable and highly toxic
compound
9. RESULT AND DISCUSSIONS Percentage of oil extraction from oil
cake = 11.31 %
10. RESULT AND DISCUSSIONS (contd) Percentage of solvent
(n-Hexane) recovery= 65.5 %
11. RESULT ANALYSIS The given oil cake was already extracted
before Some oil was attached to the wall of the apparatus
Considerable amount of n-Hexane was lost due to high volatility
Some n-Hexane was consumed by oil cake (residue) and thimble Use of
single condenser yielded low efficiency Sufficient time was not
given
12. OPERATING VARIABLES OF THE EXPERIMENT Extraction time
Quantity of solvent Solvent temperature Nature of the solvent
13. CONCLUSION A basic idea about solvent extraction process
was conveyed through out the experiment. Although the results
attained from the experiment was of less aptitude, it can be
undoubtedly concluded that the main purpose of the experiment was
achieved successfully.
